javafx.util

Interface Callback<P,R>

Type Parameters:

P - The type of the argument provided to the call method.

R - The type of the return type of the call method.

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface Callback<P,R>

The Callback interface is designed to allow for a common, reusable interface to exist for defining APIs that requires a call back in certain situations.

Callback is defined with two generic parameters: the first parameter specifies the type of the object passed in to the call method, with the second parameter specifying the return type of the method.

Since:

JavaFX 2.0

Method Summary

Modifier and Type	Method and Description
R	call(P param) The call method is called when required, and is given a single argument of type P, with a requirement that an object of type R is returned.

Method Detail

call

R call(P param)

The call method is called when required, and is given a single argument of type P, with a requirement that an object of type R is returned.

Parameters:

param - The single argument upon which the returned value should be determined.

Returns:

An object of type R that may be determined based on the provided parameter value.